Sigvald Johannesson (1877–1953) was a civil engineer best known for his design of the

Pulaski Skyway The Pulaski Skyway is a four-lane bridge-causeway in the northeastern part of the U.S. state of New Jersey, carrying a freeway designated U.S. Route 1/9 (US 1/9) for most of its length. The structure has a total length of . Its long ...

. Johannesson was a graduate of the

University of Copenhagen The University of Copenhagen (, KU) is a public university, public research university in Copenhagen, Copenhagen, Denmark. Founded in 1479, the University of Copenhagen is the second-oldest university in Scandinavia, after Uppsala University. ...

who later worked on the

London Underground The London Underground (also known simply as the Underground or as the Tube) is a rapid transit system serving Greater London and some parts of the adjacent home counties of Buckinghamshire, Essex and Hertfordshire in England. The Undergro ...

. He emigrated to the United States and worked on the

North River Tunnels North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' ...

and the

Hudson and Manhattan Railroad The Port Authority Trans-Hudson (PATH) is a rapid transit system in the northeastern New Jersey cities of Newark, Harrison, Jersey City, and Hoboken, as well as Lower and Midtown Manhattan in New York City. It is operated as a wholly owne ...

tunnels under the

Hudson River The Hudson River, historically the North River, is a river that flows from north to south largely through eastern New York (state), New York state. It originates in the Adirondack Mountains at Henderson Lake (New York), Henderson Lake in the ...

. He joined the New Jersey Highway Department (now the

New Jersey Department of Transportation The New Jersey Department of Transportation (NJDOT) is the agency responsible for transportation issues and policy in New Jersey, including maintaining and operating the state's highway and public road system, planning and developing transport ...

) during the early development of the Skyway project and is considered to be responsible for its ultimate design. Johannesson worked the agency until his retirement in 1948 as head of the Division of Planning and Economics. In 1931, he published a seminal work entitled ''Highway Economics''. He died in 1953.

References

1877 births 1953 deaths Danish civil engineers American civil engineers Engineers from New Jersey University of Copenhagen alumni {{Denmark-engineer-stub